This is a building for the public health authority. Its mission to protect health is multi-faceted. To be consistent with the work it performs, the project had to create working environments that fostered a sense of healthiness. The materials, chosen for their virtuousness, are natural, recyclable, with no solvents or plastics. The wood is certified as having been grown in sustainably managed forests. Located along the edge of the Bois de Vincennes, the project draws inspiration from its surrounding environment: a structure and façade made entirely of wood, a plan as bundles of sticks, all in an open form that protects the beautiful existing tree. The building consists of two open wings that reach out to the longest side of the lot’s triangular shape. The configuration echoes the layout of the nearby château de Vacassy and Villermé pavilion, suggesting a movement of open, protective arms, much like those of the institution it houses.